EP1418734B1 - Moyen pour illuminer un bloc de touches et dispositif l'incorporant - Google Patents

Moyen pour illuminer un bloc de touches et dispositif l'incorporant Download PDF

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Publication number
EP1418734B1
EP1418734B1 EP02445146A EP02445146A EP1418734B1 EP 1418734 B1 EP1418734 B1 EP 1418734B1 EP 02445146 A EP02445146 A EP 02445146A EP 02445146 A EP02445146 A EP 02445146A EP 1418734 B1 EP1418734 B1 EP 1418734B1
Authority
EP
European Patent Office
Prior art keywords
keypad
light
display
light guide
rubber pad
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02445146A
Other languages
German (de)
English (en)
Other versions
EP1418734A1 (fr
Inventor
Martin Grip
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Mobile Communications AB
Original Assignee
Sony Ericsson Mobile Communications AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Ericsson Mobile Communications AB filed Critical Sony Ericsson Mobile Communications AB
Priority to EP07109791A priority Critical patent/EP1865691B1/fr
Priority to AT02445146T priority patent/ATE381201T1/de
Priority to DE60232757T priority patent/DE60232757D1/de
Priority to DE60224054T priority patent/DE60224054D1/de
Priority to EP02445146A priority patent/EP1418734B1/fr
Priority to AT07109791T priority patent/ATE434901T1/de
Publication of EP1418734A1 publication Critical patent/EP1418734A1/fr
Application granted granted Critical
Publication of EP1418734B1 publication Critical patent/EP1418734B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0202—Constructional details or processes of manufacture of the input device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1626—Constructional details or arrangements for portable computers with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1662—Details related to the integrated keyboard
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor

Definitions

  • the invention relates to means for illuminating a keypad using a light source arranged in or at a display in a device and directing a part of the light from the light source to the keypad.
  • a light guide is used to direct the light.
  • the invention also relates to a device incorporating the means, such as a mobile telephone.
  • LEDs can be very expensive depending on colour, and to obtain an even light distribution over the keypad, quite many LEDs may have to be used.
  • US 5,975,711 discloses integrated display panel assemblies.
  • One embodiment is a cellular phone comprising a light conducting panel illuminating both a liquid crystal display and a keypad.
  • EP 1 094 482 discloses a light guide for illuminating the display or keyboard of a portable communication device.
  • the light guide comprises a substantially transparent plate-formed element.
  • US 6,040,822 discloses an illuminated keyboard system.
  • the system comprises a conductor element for conducting a portion of light from a display panel to illuminate a keyboard.
  • WO 03/047222 discloses a modular liquid crystal display, wherein the light guiding means comprises apertures in the frame, a light guide and microlenses.
  • EP 1 294 161 discloses an electronic device with a light guide for illuminating the display and keypad of a portable communication device.
  • the light guide comprises a light transmitting substrate located beneath the display and the keypad.
  • a solution that both improves the light output and evenness and saves money is to utilize the already existing backlight for the display.
  • the invention provides means for illumination in a device, comprising: a display; a light source for illuminating the display; a keypad to be illuminated and guiding means for guiding part of the light from the light source to the keypad, the display being mounted in a frame, wherein the guiding means comprises apertures in the frame and a light guide connected to the apertures.
  • the light guide comprises a rubber pad which is partly translucent.
  • the light guide may comprise a lens distributing the light onto the keypad.
  • the rubber pad is shaped to extend in front of the apertures to distribute the light onto the keypad, and shaped to extend into keys of the keypad.
  • the rubber pad forms part of a structure holding the keys of the keypad together.
  • An embodiment of the invention provides a device including such an illumination means.
  • the display may comprise a LCD unit.
  • the light source comprises LEDs and a light guide located beneath or above the LCD unit.
  • the LEDs are located at one or more edges of the light guide.
  • the device may be a portable telephone, a pager, a communicator, a smart phone or an electronic organiser.
  • the invention will be described in detail with a mobile telephone as an example.
  • the invention is equally applicable in other devices having a display and keypad, such as pagers, communicators, smart phones and electronic organizers.
  • Fig. 1 shows parts of a mobile telephone with the top shell removed.
  • a display 1 On top of the phone's printed circuit board PCB is placed a display 1 and the interior parts of the keypad 2.
  • the keypad comprises a rubber pad 4 with button-like protruding parts 3.
  • the button-like parts are adapted to receive the buttons themselves (not shown).
  • the buttons may be made of plastic, each button fitting snugly over the button-like parts of the rubber pad 4.
  • the buttons are partly transparent and show a figure or another symbol on the top surface as is conventional.
  • the display portion is also shown in fig. 2. It comprises an LCD module 7 mounted in a carrier or frame 5.
  • the frame protects the LCD unit from physical damage and prevents light from leaking around the sides of the LCD unit.
  • apertures or holes 6 are provided in the edge directed to the keypad.
  • the principle of the invention is illustrated in the more schematic view of fig. 3.
  • the phone PCB 10 carries the keypad 2, the complete display unit and one or more LEDs 9.
  • the components of the display 1 are also shown at the top as a carrier 5, a LCD glass cell 7 comprising liquid crystals located between two glass plates and polarizers, a usually flat light guide 8 and an LED 9.
  • LEDs are located at the sides of the light guide.
  • the location of the LEDs is not critical as the light will be distributed from any LED located at an edge throughout the light guide and exit at all the sides, where the light is not blocked.
  • the one or more LEDs transmit light into the light guide distributing the light upwards through the LCD module to provide the backlight of the display.
  • the idea of the invention is to design small holes, such as the apertures 6 in fig. 2, in the surrounding carrier which contains the LCD glass cell and the backlight system to let light out in a controlled way.
  • the light guide is located on top of the carrier. In this case, the light guide distributes the light downwards through the LCD module which light is reflected to provide the illumination of the display. In other respects the function and design of the invention are identical.
  • light is just guided out through the apertures on to the top keypad buttons.
  • lenses may be arranged in the apertures.
  • the lenses could be small plastic lenses inserted in the apertures or part of the rubber pad could be extended to cover the apertures.
  • the rubber pad is at least partly translucent to transmit and guide the light.
  • the rubber pad 4 performs more the function of a light guide.
  • the rubber pad is shaped to extend in front of the apertures 6. Light entering the rubber pad is distributed through the rubber pad 4, particularly in the part nearest the display, and the protruding button-like parts 3 extending into the buttons and assists in illuminating the buttons.
  • optical fibres 11 are connected to the apertures 6, as is shown in fig. 2.
  • the optical fibres 11 are located near or adjacent the rubber pad, suitably at the respective row of buttons.
  • the optical fibres may be located on top of the rubber pad, under the front shell (not shown), or below the rubber pad.
  • the individual optical fibre is distributing light sideways as well as lengthways, so that an even light distribution is obtained.
  • each button is provided with its own fibre terminating at its respective button.
  • the illumination of the keypad is preferably completed by further LEDs or an electroluminant foil located under the rubber pad.
  • the need for such LEDs is decreased or the size of the electroluminant foil may be decreased, especially at the top keys near the display where there is limited space.
  • the present invention results in that fewer LEDs are required and/or better light uniformity of the keypad is obtained.

Claims (11)

  1. Moyen d'illumination dans un dispositif, comprenant : un affichage (1) ; une source lumineuse (9) destinée à illuminer l'affichage (1) ; un clavier (2) destiné à être illuminé ; et un moyen de guidage (6) pour guider une partie de la lumière de la source lumineuse (9) vers le clavier (2), caractérisé en ce que l'affichage (1) est monté dans un cadre (5), dans lequel le moyen de guidage comprend des ouvertures (6) dans le cadre et un guide de lumière (4, 11) relié aux ouvertures (6), et le guide de lumière comprend un coussinet de caoutchouc (4) qui est partiellement translucide et compris dans le clavier (2).
  2. Moyen selon la revendication 1, caractérisé en ce que le guide de lumière comprend une lentille distribuant la lumière sur le clavier.
  3. Moyen selon la revendication 1 ou 2, caractérisé en ce que le coussinet de caoutchouc (4) est mis en forme pour se placer en face des ouvertures (6) pour distribuer la lumière sur le clavier (2).
  4. Moyen selon la revendication 3, caractérisé en ce que le coussinet de caoutchouc (4) est mis en forme pour se placer dans des touches du clavier (2).
  5. Moyen selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le coussinet de caoutchouc (4) fait partie d'une structure maintenant ensemble les touches du clavier.
  6. Dispositif caractérisé en ce qu'il comprend un moyen d'illumination selon l'une quelconque des revendications précédentes.
  7. Dispositif selon la revendication 6, caractérisé en ce que l'affichage comprend une unité LCD (7).
  8. Dispositif selon la revendication 7, caractérisé en ce que la source lumineuse comprend des LED (9) et un guide de lumière (8) situés sous l'unité LCD (7).
  9. Dispositif selon la revendication 7, caractérisé en ce que la source lumineuse comprend des LED et un guide de lumière situés au-dessus de l'unité LCD.
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que les LED sont situées au niveau d'un ou plusieurs bords du guide lumineux (8).
  11. Dispositif selon l'une quelconque des revendications 6 à 10, caractérisé en ce que le dispositif est un téléphone portable, un dispositif d'avertissement d'appel, un communicateur, un téléphone multifonction ou un agenda électronique.
EP02445146A 2002-11-06 2002-11-06 Moyen pour illuminer un bloc de touches et dispositif l'incorporant Expired - Lifetime EP1418734B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP07109791A EP1865691B1 (fr) 2002-11-06 2002-11-06 Moyens pour illuminer un clavier et dispositif les incorporant
AT02445146T ATE381201T1 (de) 2002-11-06 2002-11-06 Mittel zur beleuchtung eines tastenfelds und vorrichtung mit solchem mittel
DE60232757T DE60232757D1 (de) 2002-11-06 2002-11-06 Mittel zur Tastaturbeleuchtung und Vorrichtung mit solchen Mitteln
DE60224054T DE60224054D1 (de) 2002-11-06 2002-11-06 Mittel zur Beleuchtung eines Tastenfelds und Vorrichtung mit solchem Mittel
EP02445146A EP1418734B1 (fr) 2002-11-06 2002-11-06 Moyen pour illuminer un bloc de touches et dispositif l'incorporant
AT07109791T ATE434901T1 (de) 2002-11-06 2002-11-06 Mittel zur tastaturbeleuchtung und vorrichtung mit solchen mitteln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02445146A EP1418734B1 (fr) 2002-11-06 2002-11-06 Moyen pour illuminer un bloc de touches et dispositif l'incorporant

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07109791A Division EP1865691B1 (fr) 2002-11-06 2002-11-06 Moyens pour illuminer un clavier et dispositif les incorporant

Publications (2)

Publication Number Publication Date
EP1418734A1 EP1418734A1 (fr) 2004-05-12
EP1418734B1 true EP1418734B1 (fr) 2007-12-12

Family

ID=32104053

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07109791A Expired - Lifetime EP1865691B1 (fr) 2002-11-06 2002-11-06 Moyens pour illuminer un clavier et dispositif les incorporant
EP02445146A Expired - Lifetime EP1418734B1 (fr) 2002-11-06 2002-11-06 Moyen pour illuminer un bloc de touches et dispositif l'incorporant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07109791A Expired - Lifetime EP1865691B1 (fr) 2002-11-06 2002-11-06 Moyens pour illuminer un clavier et dispositif les incorporant

Country Status (3)

Country Link
EP (2) EP1865691B1 (fr)
AT (2) ATE434901T1 (fr)
DE (2) DE60232757D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103901948A (zh) * 2012-12-27 2014-07-02 比亚迪股份有限公司 移动终端

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100631639B1 (ko) 2005-05-24 2006-10-09 엘지전자 주식회사 이동통신 단말기의 일체형 디스플레이 모듈
US20070257889A1 (en) * 2006-05-05 2007-11-08 Clemens Croy Display lit soft keys that have multiple states of activation potentially associated with each soft key

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5975711A (en) 1995-06-27 1999-11-02 Lumitex, Inc. Integrated display panel assemblies
US5684513A (en) * 1995-07-17 1997-11-04 Decker; Mark Randall Electronic luminescence keyboard system for a portable device
GB2355569A (en) * 1999-10-19 2001-04-25 Nokia Mobile Phones Ltd Light Guide
US6950680B2 (en) 2001-09-17 2005-09-27 Nokia Corporation Electronic device
US6874926B2 (en) 2001-11-26 2005-04-05 Nokia Corporation Illumination system for an electronic device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103901948A (zh) * 2012-12-27 2014-07-02 比亚迪股份有限公司 移动终端
CN103901948B (zh) * 2012-12-27 2017-08-04 比亚迪股份有限公司 移动终端

Also Published As

Publication number Publication date
EP1418734A1 (fr) 2004-05-12
DE60232757D1 (de) 2009-08-06
ATE434901T1 (de) 2009-07-15
ATE381201T1 (de) 2007-12-15
EP1865691A1 (fr) 2007-12-12
DE60224054D1 (de) 2008-01-24
EP1865691B1 (fr) 2009-06-24

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